package com.shujuwuliankeji.ems.cloud.gateway.handler;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.boot.web.reactive.error.ErrorWebExceptionHandler;
import org.springframework.cloud.gateway.support.NotFoundException;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.annotation.Order;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.ResponseStatusException;
import org.springframework.web.server.ServerWebExchange;

import com.shujuwuliankeji.ems.cloud.common.core.utils.ServletUtils;

import reactor.core.publisher.Mono;

/**
 * 网关统一异常处理
 *
 * @author ruoyi
 */
@Order(-1)
@Configuration
public class GatewayExceptionHandler implements ErrorWebExceptionHandler {
	private static final Logger log = LoggerFactory.getLogger(GatewayExceptionHandler.class);

	@Override
	public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {
		ServerHttpResponse response = exchange.getResponse();

		if (exchange.getResponse().isCommitted()) {
			return Mono.error(ex);
		}

		String msg;

		if (ex instanceof NotFoundException) {
			msg = "服务未找到";
		} else if (ex instanceof ResponseStatusException) {
			ResponseStatusException responseStatusException = (ResponseStatusException) ex;
			msg = responseStatusException.getMessage();
		} else {
			msg = "内部服务器错误";
		}

		ex.printStackTrace();
		log.error("[网关异常处理]请求路径:{},异常信息:{}", exchange.getRequest().getPath(), ex.getMessage());

		return ServletUtils.webFluxResponseWriter(response, msg);
	}
}